The MPI implementation of NPB 3.3 (NPB3.3-MPI)
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For problem reports and suggestions on the implementation,
please contact:
NAS Parallel Benchmark Team
npb@nas.nasa.gov
http://www.nas.nasa.gov/Software/NPB
This directory contains the MPI implementation of the NAS
Parallel Benchmarks, Version 3.3 (NPB3.3-MPI). A brief
summary of the new features introduced in this version is
given below.
For changes from different versions, see the Changes.log file
included in the upper directory of this distribution.
For explanation of compilation and running of the benchmarks,
please refer to README.install. For a special note on DT, please
see the README file in the DT subdirectory.
This version includes additional timers in several benchmarks.
New features in NPB3.3-MPI:
* NPB3.3-MPI introduces a new problem size (class E) to seven of
the benchmarks (BT, SP, LU, CG, MG, FT, and EP). The version
also includes a new problem size (class D) for the IS benchmark,
which was not present in the previous releases.
* The release is merged with the vector codes for the BT and LU
benchmarks, which can be selected with the VERSION=VEC option
during compilation. However, it should be noted that successful
vectorization highly depends on the compiler used. Some changes
to compiler directives for vectorization in the current codes
(see *_vec.f files) may be required.
* New improvements to BTIO (BT with IO subtypes):
- added I/O stats (I/O timing, data size written, I/O data rate)
- added an option for interleaving reads between writes through
the inputbt.data file. Although the data file size would be
smaller as a result, the total amount of data written is still
the same.
